Spring-board



J. TORS.

SPRING BOARD. APPLICATION FILED JUNE 10, 1920.

Patented July 12, 1921.

INVENTQ PATENT OFFICE.

JOHN TORS, OF CAMPBELL RIVER, BRITISH COLUMBIA, CANADA.

SPRING-BOARD.

Specification of Letters Patent.

Patented July 12, 1921.

Application filed June 10, 1920. Serial No. 387,983.

T 0 all whom it may concern:

Be it known that I, JOHN Tons, a citizen of the United States, and a resident of Campbell River, in the Province of British Columbia, Canada, have invented certain new and useful Improvements in Spring- Boards, of which the following is a specification. Y

My invention relates to improvements in springboards, such as are used in logging operations, and the object of my invention is to provide a device of this nature adapted to be held firmly when in position and capable of being swung laterally as requlred, and which is safe, practical, and convenient.

I attain this object by the constructlon illustrated in the accompanying drawings in which Figure 1 is a perspective View of the shoe.

Fig. 2 is a perspective view illustrating the practical application of the invention.

Similar figures of reference indicate similar parts in the views.

Usually the end of the springboard, indicated by the numeral 1, is simply inserted in a. slot 2 cut in the tree trunk 3, but this is unsatisfactory, unsafe, and inconvenient, as the end may slip out at any moment and besides the board cannot be swung around laterally to different positions when required.

To eliminate these defects I provide a shoe 4, constructed of metal plate or cast in one piece as desired, consisting of upper and lower plates 5 and 6 spaced apart by vertical ribs 7 to form a jaw 8 into which jaw the end of the springboard 1 is inserted. Adjacent its rear end the plate 5 is provided with a pivot 9 on which is rotatably mounted a dished plate 10 the upstanding wall of which is notched, as at 11, to form teeth 12, the upper edge of the wall being thinned so that the teeth are comparatively sharp. The end of the board 1 is secured in place by means of screws passed into it through holes 13 in the shoe.

In use the end of the shoe carrying the dished plate is inserted in the slot 2, from which it will be seen that weight on the board will force the teeth 12 into the roof of the slot, thus preventing inadvertent withdrawal of the shoe, while at the same time the latter is free to swing on the pivot 9, thus providing a safe springboard which is at the same time very convenient and of great utility.

hat I claim as my invention is:

1. In a device of the class described, a shoe adapted to receive the end of a board, and a cup-shaped member pivotally mounted on said shoe.

2. In a device of the class described, a shoe adapted to receive the end of a board, and a cup-shaped member pivotally mounted on said shoe, the edge of said member being sharpened.

8. In a device of the class described, a shoe adapted to receive the end of a board, and a cup-shaped member pivotally mounted on said shoe, the edge of said member being toothed.

4. In a device of the class described, a shoe in the form of a socket insertible in a notch in a tree and adapted to receive one end of a board, one wall of said socket being adapted to be supported against one wall of the notch and the opposite wall of the socket being provided with means for pivotally anchoring the socket to the opposite wall of the notch.

5. A device of the character described comprising a socket member and a plate pivotally secured upon the upper wall of the socket member and provided with penetrating means for pivotally anchoring the socket to a support.

Signed at oampbell River, British Columbia, Canada, this 5th day of May, 1920.

JOHN TORS. 

